Add 81/72 and 15/25
1st number: 1 9/72, 2nd number: 15/25
81/72 + 15/25 is 69/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 25 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
81/72 = 81 × 25/72 × 25 = 2025/1800 - Likewise, for the 2nd fraction, since 25 × 72 = 1800,
15/25 = 15 × 72/25 × 72 = 1080/1800 - Add the two like fractions:
2025/1800 + 1080/1800 = 2025 + 1080/1800 = 3105/1800 - 3105/1800 simplified gives 69/40
- So, 81/72 + 15/25 = 69/40
In mixed form: 129/40
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